1200 calories?

I'm really confused about how many calories a day i should eat. I have tried researching but i just get more confused. Currently i'm at 1200 a day... For the last few days my weight has been the exact same? Am i not eating enough? I'm thinking about upping my calories or should i wait and see? Does anyone have any advice based on personal experience?
Also, how many % should be from carbs, fat, and protein? And what would you recommend for salt and sugar intake?
Thanks

My own personal experience - 1200 was not enough. Also, daily weighing is not going to be an accurate reflection of fat loss. I am a daily weigher myself, but it's just a habit, and I find it fascinating to see how I can go up and down several pounds during the week, but my clothes fit the same, or the measuring tape shows inches lost. The scale lies! Well, it doesn't lie, but your daily weight isn't always the best measure of progress - just keep that in mind if you weigh yourself daily. If the fluctuations frustrate you, drop back to only weighing yourself weekly, or every two weeks.

Anyway, back to the 1200 - I found this topic to be very helpful in finding and setting my goals for calories, target body weight, body fat percentage, etc, etc: http://www.myfitnesspal.com/topics/show/654536-in-place-of-a-road-map-2-0-revised-7-2-12

And I'm not the only one - there's a group for it as well: http://www.myfitnesspal.com/forums/show/7965-in-place-of-a-road-map

Read the topic, run your numbers through the tools in the links provided there, and follow the plan for manually changing your settings here at MFP. The percentages for setting your macros are given there as well. It's good stuff, check it out.